Vulcanizer.



S. H. HORNE.

VULCANIZER. APPLIOATION FILED DE0129,190&

v 1,008,469. Patented N 1v. 14, 1911.

INVENTQR,

' coi sulicientlT high y tric vulcanizers,

ers, which are in necessary .to vulcanize SANFORD H. HORNE, OF SAN FRANCISCO, CAL FORNT'IA.

VULCANIZER.

Specification of Letters Patent.

Application filed December 29, 1908.

Pai ented Nov. 14, 11911. serial No. 469, lo?.

To all whom 'it may concern:

Be it known that I, SANFORD H. H Olmi-1, a citizen ot the United States, residing at San Francisco, in the county oi San Francisco and State of California, have invented new and useful Improvements in Vuleanizers, of which the following is a specification.

The present invention relates to vulcanizgeneral use for vulcanizing rubber, especially rubber patches on the inner tubes of automobile tires, and on the outer casings of the same.

It relates especially to that class of vulcanizers in which a thermostat employed to lprevent undue heating ot the resistance The main. object of the invention is to provide a vulcanizer, the heating surface of which shall'be Fas small as possible, so that it will heat the leastamount ofrubber i thepatch, and to accomplish 4this vresult while maintaining a degree of heat. With elecmy knowledge-extends, the extent of the heating surface has been. much greater than 1s necessary to vulcanize the patch. The heating of rubber as small an extent of surface as pos- Thls I accomplish in my invention. A further object of the inventlon 1s to 4 provide such an apparatus` that is conven- 1. i horizontal fied form'otf' ase;

lent in use, easy to repair when the'resistance-coil is burned out, and which can be used with a great variety of bases for different purposes. i

In the accompanying drawing, Figure 1 is a side View showing Athe apparatus in use.; Fig. 2 is a section ofthe device Fig. 3 is a. .section through the thermostat; Fig. et is a cross section of the basethereof detached; Fi 5 a similar view'of a modii Fig.v is a plan view of a further moditied form-ot base.

Referring to the drawing, 1 indicates a conical shell, to 'the lower portion of which bis screwed a hollow handle 2. Said shell is I purpose of which will form,ed, in the 'vertical plane. through the aY heater, comprising a circular fcentral hollow stem 7 rising om said and connected with heretofore in use, so far as` has a deleterious effect, `and it is therefore desirable to confine the .heat to sible.

'bears-,down in the re-ess The vulcanizer is by, yilaced in position on `ing plate late and V plate. Around sait stem is wound a resistance coil 8, one of t ie ends of said coil leading to a terminal 9 adjacent to the handle, and the other end p issing through the shell of the vulcanizcr a 1d insulated therefrom, the stationary end of a Sail thermostat is secured around the lower po ltion ot' the conical shell and consists of two curved strips 11.', .12, of dissimilar metals rii eted together, of which the inner metal is he more expansive by heat. The stationar I end of the thermostat is secured to the ouiside ot' the shell there being interposed an insulated piece 14. of material such as laa or mica, which will permit of a sutiicient amount of heat to pass to heat the thermost 1t when the vulcanizer becomes heated, whil e at the same time prevent-ing the short-cil cuiting of the current. In the free end of thi i compound strip :torming the thermostat i; screwed an adjusting screw 15,the end o't which bears against a terminal 1G. Tosaid terminals 9, 16, are securedwires 417 Whicl' lead through the ho]- low handle 2.

The lengths of the thermostat 10.

strips arc so propertioned, and the adjus ing screw so adjusted that, when the heat of the vulcanizer hecomes excessive, a bn ak made in the circuit between the 4thi rmostat and the terminal'lti, and the cui rent no longer passes, whereby the heat iinnediately begins to diminish. Thus the levice is self-regulating as to the degree (t heat to which it attains.. l

In using the vulcfnizer upon an inner tube, upon a board 18 is secured a block 19, from which block axtends an arm` 20, through which is screw red a screw 21,- having a .hand wheel 22, the (nd of which screw 21 5 formed inthe top of the vulcanizer. means of the handle the inner tube, and th an hy screwing down the screw pressure is applied to press the vulcanizei against the Jatoh in the tube.

This vulcanizer is us` ed with various forms of bases, when necess: .ry to repair a very large cutor tear. In the form shown in Figs. 1 to 4, the base is rectangular, and with a flat or level lov `er surface, the heat- Grof the vulc inizer boing set into a circular recess in the hase and secured thereto by means of a :crew 24. This form of base is suitable for vulcanizing the inner tube of an automobile tire. For vulcanizing an outer Casin ofthe tire, there is of the shell and consisting of two strips of substituted ,the base sEown in Fi 5, the dissimilar metals, secured together, and seunder surface of' Whic while straight loncured at one end to said shell, the other' end gitudinally, is concaved transversely, as bein free, said 'shell being formed above shown at 25. r the Eandle, in the 4vertical plane through,

In Fig. 6 is shown a modified form of basel and on the side adjacent thereto With a houssuitable for vulcanizing a part of the inner ing for a thermometer, and a thermometer -tube of the tire adjacent to an alr valve, 1n said housing, substantially as described.

the'base being formed with an aperture 27 2. A -vulcan1zer, comprising afconicalv 10 to permit the alr value to passtherethrou h shell, havlng a recess in its apex,y a heater -and the lower surface o the base to ile plate secured 'to the bottom of said shell,

snugly upon the casing. a hollow stem Within said shell, a resistance y the above construction I provide a vulcoll carried by said stem, a handle secured canizer in which the heater 6 will be .comthe lower portion of said shell, and extend- 15 paratively small, so that-it can be ap lied ing horizontally :from the same, a thermostat over a comparatively small surface ci), the extending closely'v around the lower portion rubber, and at the same time sui'lcient heat of, the shell and consisting'of two strips of is obtained. This effect is roduced by readissimilar metals, secured together, and sesonof theconstruction of t e heater having cured at onejend to said shell, the other end 2o a central stem 7 formed integral therewith being free, said shell being formed above to which a large amount of 'heat can be imt-he handle, in the vertical plane there` parted by the resistance coil 8. through, and on the side adjacent `thereto, I claim 1. A vulcanizer, comprising a conical thermometer in said housin 25 shell, having-a recess in its apex, a heater In testimony whereof I have hereunto 'set plate secured to the bottom of said shell, a my handin the presence of two subscribing resistance coil within the shell and arranged Witnesses.

to heat said plate, a handle. secured to the SANFORD H. HORNE.. lower portion of said shell, and extending XVitnesses: 'l

I:,fo horizontally from the same, a thermostat l FRANCIS M. WRIGHT, 'I l' extending closely around `the lower portion 'B. RICHARDS. 

